Rheologic activation of blood platelets. Preliminary study
Voisin, P.; Larcan, A.; Stoltz, J.F.
Journal des Maladies Vasculaires 8(1): 33-36
1983
ISSN/ISBN: 0398-0499 PMID: 6188796 Document Number: 219194
A Couette type coaxial cylinder viscosimeter was used to evaluate the influence of deformation rates up to 20,000/s on blood platelets, in the presence or absence of red cells. Plasma lactate dehydrogenase and haemoglobin levels were determined in order to assess cell lysis and the estimation of beta-thromboglobulin (beta-TG) was considered to be an index of platelet activation. Results for whole blood revealed a change in red cells from 10,000/s upwards, which increased as the rate rose. At the same time, beta-TG rose slowly from the lowest deformation rates then considerably, in relation with the liberation of erythrocytic substances. The rise in LDH and beta-TG levels in platelet rich plasma (PRP) remained small up to 7,000/s approximately, then increased very rapidly, suggesting earlier mechanical and biochemical activation than in whole blood.